20533760

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{617}}^1$

素因数の和:653

約数の個数: 80

約数和(自身を含む): 53105976

約数和(自身を除く): 32572216

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 617, 640, 832, 1040, 1234, 1280, 1664, 2080, 2468, 2560, 3085, 3328, 4160, 4936, 6170, 6656, 8021, 8320, 9872, 12340, 16042, 16640, 19744, 24680, 32084, 33280, 39488, 40105, 49360, 64168, 78976, 80210, 98720, 128336, 157952, 160420, 197440, 256672, 315904, 320840, 394880, 513344, 641680, 789760, 1026688, 1283360, 1579520, 2053376, 2566720, 4106752, 5133440, 10266880, 20533760]

約数ペア:

[(1, 20533760), (2, 10266880), (4, 5133440), (5, 4106752), (8, 2566720), (10, 2053376), (13, 1579520), (16, 1283360), (20, 1026688), (26, 789760), (32, 641680), (40, 513344), (52, 394880), (64, 320840), (65, 315904), (80, 256672), (104, 197440), (128, 160420), (130, 157952), (160, 128336), (208, 98720), (256, 80210), (260, 78976), (320, 64168), (416, 49360), (512, 40105), (520, 39488), (617, 33280), (640, 32084), (832, 24680), (1040, 19744), (1234, 16640), (1280, 16042), (1664, 12340), (2080, 9872), (2468, 8320), (2560, 8021), (3085, 6656), (3328, 6170), (4160, 4936)]